Suppose that a small town has seven burger shops whose respective shares of the local hamburger market are (as percentages of all hamburgers sold): 27 percent, 26 percent, 22 percent, 12 percent, 7 percent, 4 percent, and 2 percent. Instructions: Enter your answers as a whole number. What is the four - firm concentration ratio of the hamburger industry in this town? percent What is the Herfindahl index for the hamburger industry in this town? If the top three sellers combine to form a single firm, what would happen to the four - firm concentration ratio and to the Herfindahl index? Four - firm concentration ratio = percent Herfindahl index =

Jenkins Ltd manufactures remote control cars which sells for $500 each. The fixed cost is $70000 and the variable cost per unit is $300. Jenkins sold 200 units of car. Find the total cost and total revenue for Jenkins Ltd.

Economic Dispatch Question It is required to investigate the economic dispatch of three power plants located in the western part of Victoria. The total load (PD) to be supplied by those power plants is 1500 MW. Assume the cost functions and the generation limits for these power plants are as follows. 350+ 4.2 P₁ + 0.006 P² 600 + 3.1 P₂ + 0.004 P² 500+ 4.2 P3 +0.007 P3 a) b) c) Plant 1: C₁ Plant 2: C₂ Plant 3: C3 = = = 150 ≤ P₁ ≤ 550 350 ≤ P₂ ≤ 700 120 ≤P3 ≤ 400 If the total load is shared among the three power plants equally, what is power generation of each power plant and what is the total operating cost in $/hr in this case. Find the optimal (economic) dispatch of each plant, the incremental operating cost 1, and the total operation cost in $/hr. (You don't need to use the iteration method). If it is expected that those power plant will operate in average 18 hrs a day, how much saving in cost if the economic dispatch operation with shared power operation (in part a).

D.1.